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建立了磺胺甲噁唑的二阶导数差示脉冲极谱定量分析方法，磺胺甲噁唑在１０％ ＨＣｌ－（硼酸－氧化钾缓冲溶液）－水（５：５：９０）的底液中，于－１．４５Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）处出现一良好的 二阶导数差示脉冲极谱峰，磺胺甲噁唑浓度与其峰高在０．０８～０．８０ｍｍｏｌ／Ｌ范围内呈线性关 系（ｐ＜ ０．０１），检测限为 ８．６ｎｍｏｌ／Ｌ。本法简便、快速、灵敏，结果准确。
A second order derivative differential pulse polarographic method for the determination of sulfamethoxazole was established. Sulfamethoxazole was mixed with 10% HCl- (boric acid-potassium oxide buffer) -water (5: 5: 90) A good second derivative differential polarographic peak appeared at -1.45V (vs.Ag / AgCl), and the concentration of sulfamethoxazole showed a linear relationship with the peak height in the range of 0.08 ~ 0.80mmol / L (P <0.01), the detection limit was 8.6nmol / L. This method is simple, fast, sensitive and accurate.